the quandry - which species is best suited for the following applications in my TF Casa Magnifica at 4200'ASL, Lake Patagonia Ranch, AZ. No snow, no seismic, 17" annual rainfall, lotsa wind most everyday. Annual temp swings average 25 - 95 degrees F. Average relative humidity less than 15%.

Under the roofing SIP's (exposed ceiling)
Aspen or Cypress or ? (1x6 T&G) Why ?

Under the metal porch roof (EPDM underlayment) 2x6 T&G Roof will take a monstrous solar beating 11+ months of the year, day/night thermal shift as much as 70 degrees.
Aspen or Cypress or ? Why ?

Nominal 8' tall posts around perimeter of porch , topped with capitals under the face beam. Exposed to the sun and the weather.
Pine or Fir or Mesquite or ? Wet or dry ?Why ?
Finished with what ?

Assume cost trade offs will be considered but not controlling if species selection dictates otherwise.

My wood species research to date has pointed out several chacteristics to be considered but have been unable to "experience" validate any one.